1 files changed, 22 insertions, 0 deletions
diff --git a/docs/users_guide_2_src/eg_4.py b/docs/users_guide_2_src/eg_4.py
new file mode 100644
index 0000000..8fab657
--- /dev/null
+++ b/docs/users_guide_2_src/eg_4.py
@@ -0,0 +1,22 @@
+from Cheetah.Template import Template
+from Cheetah import NameMapper
+
+#Error. Cheetah cannot find 'x' because
+#it is not dictionary key or instance member:
+
+
+class X:
+    pass
+
+x = X()
+x.value3 = 3
+    
+tmpl = "$x.value3"
+NS = [x]
+t = Template.compile(source=tmpl)(namespaces=NS)
+try:
+    t.respond()  #Here substitution is attempted
+except NameMapper.NotFound, e: 
+    print 'NameMapper.NotFound: %s' % e
+    #NameMapper.NotFound: cannot find 'x'
+